The original GTX 650 Ti was a cut down GTX 660 which used in 16 ROPs, 128-bit bus, and a 925 MHz clock speed. The new ZOTAC GTX 650 Ti Boost features less cuts as it has all 24 ROPs and full 192-bit bus. It now features a default clock of 993 MHz too. ZOTAC also goes the extra mile with a dual fan cooler that lowers noise and ensures Boost works more efficiently.
The ZOTAC GTX 650 Ti Boost could take the title of best "bang for your buck" as performance should be in the same range as $225+ cards with a price of $169. This is not something you just include in consideration for a new graphics card; this is the product by which you measure all others.